Display apparatus and display method

Abstract

A display apparatus switchable between a first mode and a second mode is provided. The display apparatus includes a transparent light emitting layer, a light modification layer and a first polarization layer. The transparent light emitting layer is configured to display image in the first mode and be disabled in the second mode. The light modification layer is disposed under the transparent light emitting layer. The first polarization layer between the transparent light emitting layer and the light modification layer is configured to polarize an incident light which transmits through the transparent light emitting layer. When the display apparatus is operated in the first mode, the light modification layer is configured to absorb the incident light, and when the display apparatus is operated in the second mode, the light modification layer is configured to reflect the incident light. Another display apparatus and a display method are also provided.

What is claimed is:  
     
       1. A display apparatus, which is switchable between a first mode and a second mode, comprising:
 a transparent light emitting layer configured to display image in the first mode and be disabled in the second mode; 
 a light modification layer, disposed at a first side of the transparent light emitting layer which is under the transparent light emitting layer and comprising a first substrate, a second substrate under and opposed to the first substrate, a plurality of electrodes disposed on the second substrate, a liquid crystal layer disposed between the first substrate and the second substrate, and a reflective layer disposed under the liquid crystal layer; and 
 a first polarization layer disposed between the transparent light emitting layer and the light modification layer and configured to polarize an incident light which transmits through the transparent light emitting layer, 
 wherein the light modification layer further comprises a first quarter waveplate disposed between the first polarization layer and the first substrate, and wherein when the display apparatus is operated in the first mode, the light modification layer is configured to absorb the incident light by the liquid crystal layer; and when the display apparatus is operated in the second mode, the light modification layer is configured to reflect the incident light by the reflective layer so that the incident light is reflected as a reflected light transmitting through the transparent light emitting layer. 
 
     
     
       2. The display apparatus as claimed in  claim 1 , wherein the light modification layer further comprises a color filter layer, the reflective layer is disposed on the electrodes and the color filter layer is disposed between the liquid crystal layer and the reflective layer. 
     
     
       3. The display apparatus as claimed in  claim 2 , wherein the reflective layer having a surface facing to the transparent light emitting layer is bump-shaped. 
     
     
       4. The display apparatus as claimed in  claim 2 , wherein the color filter layer having a first portion and a second portion, and wherein a first wavelength of the incident light and the reflected light is absorbed by the first portion and the incident light and the reflected light transmitted through the second portion without being absorbed. 
     
     
       5. The display apparatus as claimed in  claim 1 , wherein when the display apparatus is operated in the first mode, a first voltage is applied though at least one of the electrodes to generated a first electric field and the liquid crystal layer is induced by the first electric field to transmit the incident light through the liquid crystal layer without changing a polarization state of the incident light, and when the display apparatus is operated in the second mode, no voltage is applied though at least one of the electrodes and the polarization state of the incident light is changed by the liquid crystal layer. 
     
     
       6. The display apparatus as claimed in  claim 1 , wherein the first polarization layer comprises a second quarter waveplate and a first linear polarizer and wherein the first linear polarizer is disposed between the second quarter waveplate and the first substrate. 
     
     
       7. The display apparatus as claimed in  claim 1 , wherein the transparent light emitting layer further comprises a second linear polarizer disposed at a second side of the transparent light emitting layer and a third quarter waveplate disposed between the second linear polarizer and the transparent light emitting layer and wherein the second side of the transparent light emitting layer is opposite to the first side of the transparent light emitting layer. 
     
     
       8. The display apparatus as claimed in  claim 1 , wherein the display apparatus further comprises a circular polarizer disposed at a second side of the transparent light emitting layer and wherein the second side of the transparent light emitting layer is opposite to the first side of the transparent light emitting layer. 
     
     
       9. The display apparatus as claimed in  claim 1 , wherein the light modification layer further comprises a third linear polarizer, a forth linear polarizer and a color filter layer; and wherein the third linear polarizer is disposed between the first polarization layer and the first substrate; the reflective layer is disposed under the second substrate facing away from the transparent light emitting layer; the forth linear polarizer is disposed between the second substrate and the reflective layer; the third linear polarizer and the forth linear polarizer are crossed; and the color filter layer is disposed between the forth linear polarizer and the reflective layer. 
     
     
       10. The display apparatus as claimed in  claim 9 , wherein the first polarization layer is a quarter waveplate. 
     
     
       11. The display apparatus as claimed in  claim 9 , wherein the color filter layer having a first portion and a second portion, and wherein a first wavelength of the incident light and the reflected light is absorbed by the first portion and the incident light and the reflected light transmitted through the second portion without being absorbed. 
     
     
       12. The display apparatus as claimed in  claim 9 , wherein the reflective layer having a surface facing to the transparent light emitting layer is bump-shaped. 
     
     
       13. A display apparatus, which is switchable between a first mode and a second mode comprising:
 a transparent light emitting layer configured to display image in the first mode and be disabled in the second mode; and 
 a light modification layer disposed at a first side of the transparent light emitting layer which is under the transparent light emitting layer and comprising a first substrate, a second substrate under and opposed to the first substrate, and a plurality of pixel units disposed between the first substrate and the second substrate, wherein each pixel unit includes an electrode and a color medium, 
 wherein when the display apparatus is operated in the first mode, the light modification layer is configured to absorb an incident light, which transmits through the transparent light emitting layer, by the color medium; and when the display apparatus is operated in the second mode, the light modification layer is configured to reflect the incident light so that the incident light is reflected as a reflected light transmitting through the transparent light emitting layer, and 
 wherein the pixel unit comprises a micro-container, and the color medium comprises a plurality of first charged color particles and a plurality of second charged color particles and the micro-containers contains the first charged color particles and the second charged color particles and the first charged color particle absorbed the incident light transmitted through the transparent light emitting layer and the second charged color particle reflected the incident light transmitted through the transparent light emitting layer. 
 
     
     
       14. The display apparatus as claimed in  claim 13 , wherein when the display apparatus is operated in the first mode, a first voltage is applied though the electrode in at least one of the pixel units to generated a first electric field and the first charged color particles is induced by the first electric field and repelled toward the first substrate and the second charged color particles is attracted toward the electrode, and when the display apparatus is operated in the second mode, a second voltage is applied though the electrode in at least one of the pixel units to generated a second electric field and the second charged color particles is induced by the second electric field and repelled toward the first substrate and the first charged color particles is attracted toward the electrode. 
     
     
       15. The display apparatus as claimed in  claim 13 , wherein the light modification layer further comprises a color filter layer disposed between the transparent light emitting layer and the first substrate. 
     
     
       16. The display apparatus as claimed in  claim 13 , wherein the display apparatus further comprises a first polarization layer disposed between the light modification layer and the transparent light emitting layer and a second polarization layer disposed at a second side of the transparent light emitting layer and wherein the second side of the transparent light emitting layer is opposite to the first side of the transparent light emitting layer. 
     
     
       17. The display apparatus as claimed in  claim 16 , wherein the first polarization layer is a quarter waveplate and the second polarization layer is a circular polarizer. 
     
     
       18. The display apparatus as claimed in  claim 16 , wherein the first polarization layer is a quarter waveplate and the second polarization layer comprises a linear polarizer and a quarter waveplate disposed between the linear polarizer and the transparent light emitting layer. 
     
     
       19. The display apparatus as claimed in  claim 13 , wherein the light modification layer further comprises a hydrophobic layer disposed on the second substrate and a reflective layer disposed between the hydrophobic layer and the second substrate, the color medium comprises a polar first liquid and a colored and non-polar second liquid disposed in the pixel unit and the first liquid and the second liquid are immiscible. 
     
     
       20. The display apparatus as claimed in  claim 19 , wherein when the display apparatus is operated in the first mode, no voltage is applied though the electrode in at least one of the pixel units and the second liquid cover the electrode and absorbed the incident light, and when the display apparatus is operated in the second mode, a first voltage is applied though the electrode in at least one of the pixel units to generated a first electric field to modify a wetting property of the second liquid and the incident light is transmitted through the first liquid and reflected by the reflective layer. 
     
     
       21. The display apparatus as claimed in  claim 19 , wherein the light modification layer further comprises a color filter layer disposed between the hydrophobic layer and the reflective layer.